Direct-current stabilized power supply device
First Claim
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1. A direct-current stabilized power supply device, comprising:
- an output element that receives an input voltage from outside; and
a control circuit that controls the output element so that an output voltage of the direct-current stabilized power supply device is stabilized, the direct-current stabilized power supply device, further comprising;
a voltage supply circuit that steps down the input voltage and outputs the voltage thus obtained as a voltage for driving the control circuit, wherein the voltage supply circuit is built as a charge pump circuit that steps down the input voltage and then outputs the voltage thus obtained.
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Abstract
In a direct-current stabilized power supply device provided with an output transistor that receives an input voltage from the outside and a control circuit that controls the output transistor so that an output voltage of the direct-current stabilized power supply device is stabilized, there is provided a voltage supply circuit that steps down the input voltage and outputs the voltage thus obtained as a voltage for driving the control circuit. The voltage supply circuit is built as a charge pump circuit that steps down the input voltage and then outputs the voltage thus obtained.
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Citations
11 Claims
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1. A direct-current stabilized power supply device, comprising:
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an output element that receives an input voltage from outside; and
a control circuit that controls the output element so that an output voltage of the direct-current stabilized power supply device is stabilized, the direct-current stabilized power supply device, further comprising;
a voltage supply circuit that steps down the input voltage and outputs the voltage thus obtained as a voltage for driving the control circuit, wherein the voltage supply circuit is built as a charge pump circuit that steps down the input voltage and then outputs the voltage thus obtained. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification